Is there another story of the black haired friend who also married a male omega?

Gentle Forest?

Is it the same character? The friend of the red male omega MC?

Nope, the story you want is called Dog and Bird. Male red head omega was friends with a Dark haired alpha.

Gentle Forest also has dark haired characters that were friends.

If it's not by the same artist, then it's not what Netty is looking for.

Oh, now I understand. lol I thought she wanted another rec.

yeah, that's what they asked